package cn.edu.xmu.wnw.dao.impl;

import java.util.List;

import org.hibernate.LockMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import cn.edu.xmu.wnw.dao.ArticleDAO;
import cn.edu.xmu.wnw.pojo.Article;

/**
 * A data access object (DAO) providing persistence and search support for
 * Article entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see cn.edu.xmu.wnw.pojo.Article
 * @author MyEclipse Persistence Tools
 */

public class ArticleDAOImpl extends HibernateDaoSupport implements ArticleDAO
{
	private static final Logger log = LoggerFactory
			.getLogger(ArticleDAOImpl.class);
	// property constants
	public static final String TITLE = "title";
	public static final String CONTENT = "content";
	public static final String HIT = "hit";
	public static final String STATE = "state";

	public void initDao()
	{
		// do nothing
	}

	public void save(Article transientInstance)
	{
		log.debug("saving Article instance");
		try
		{
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		}
		catch (RuntimeException re)
		{
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Article persistentInstance)
	{
		log.debug("deleting Article instance");
		try
		{
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		}
		catch (RuntimeException re)
		{
			log.error("delete failed", re);
			throw re;
		}
	}

	public Article findById(java.lang.Integer id)
	{
		log.debug("getting Article instance with id: " + id);
		try
		{
			Article instance = (Article) getHibernateTemplate().get(
					"cn.edu.xmu.wnw.pojo.Article", id);
			return instance;
		}
		catch (RuntimeException re)
		{
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Article instance)
	{
		log.debug("finding Article instance by example");
		try
		{
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		}
		catch (RuntimeException re)
		{
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value)
	{
		log.debug("finding Article instance with property: " + propertyName
				+ ", value: " + value);
		try
		{
			String queryString = "from Article as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		}
		catch (RuntimeException re)
		{
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByTitle(Object title)
	{
		return findByProperty(TITLE, title);
	}

	public List findByContent(Object content)
	{
		return findByProperty(CONTENT, content);
	}

	public List findByHit(Object hit)
	{
		return findByProperty(HIT, hit);
	}

	public List findByState(Object state)
	{
		return findByProperty(STATE, state);
	}

	public List findAll()
	{
		log.debug("finding all Article instances");
		try
		{
			String queryString = "from Article";
			return getHibernateTemplate().find(queryString);
		}
		catch (RuntimeException re)
		{
			log.error("find all failed", re);
			throw re;
		}
	}

	public Article merge(Article detachedInstance)
	{
		log.debug("merging Article instance");
		try
		{
			Article result = (Article) getHibernateTemplate().merge(
					detachedInstance);
			log.debug("merge successful");
			return result;
		}
		catch (RuntimeException re)
		{
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Article instance)
	{
		log.debug("attaching dirty Article instance");
		try
		{
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Article instance)
	{
		log.debug("attaching clean Article instance");
		try
		{
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public ArticleDAOImpl getFromApplicationContext(ApplicationContext ctx)
	{
		return (ArticleDAOImpl) ctx.getBean("ArticleDAO");
	}
}